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- Title
基于 SAW 滤波器的电磁寄生提取.
- Authors
胡 月; 白 凤; 周艺蒙; 范 维; 魏子杰; 李沛然; 帅 垚; 吴传贵; 罗文博; 潘忻强; 张万里
- Abstract
Considering the electromagnetic parasitic parameters of the encapsulated tube shell and layout, the passband of an RF surface acoustic wave (SAW) filter narrows, and the standing wave increases. This paper proposes a method to quickly extract the electromagnetic parasitic effects in the package shell and layout and accurately simulate their influence on filter performance. First, FEM electromagnetic simulation software was used to extract the electromagnetic parasitic parameters of the encapsulated tube shell. Then, circuit simulation software was employed to co-simulate the designed filter with the extracted packaging parasitic parameters and filter layout. This approach eliminates the need for repeated electromagnetic simulations in FEM software, improving time efficiency. The method was verified on a SAW filter with a center frequency of 1 268 MHz, a passband insertion loss of less than 1 dB, an in-band standing wave of less than 1.6, an in-band fluctuation of 0. 5 dB, and a bandwidth of 24 MHz (relative bandwidth of 1.8%). The SAW resonators used in this design were de-embedded, allowing for more accurate simulation of the measured filter results.
- Subjects
ACOUSTIC surface waves; STANDING waves; SIMULATION software; INSERTION loss (Telecommunication); BANDWIDTHS
- Publication
Piezoelectrics & Acoustooptics, 2024, Vol 46, Issue 4, p453
- ISSN
1004-2474
- Publication type
Article
- DOI
10.11977/j.issn.1004-2474.2024.04.006